import { System } from '../core/System';
export declare class RenderSystem extends System {
    static priority: number;
    /** 是否显示调试信息 */
    showDebug: boolean;
    /** 是否显示碰撞体 */
    showColliders: boolean;
    onRender(ctx: CanvasRenderingContext2D): void;
    private renderEntity;
    private renderDebug;
    /**
     * 绘制圆形
     */
    static drawCircle(ctx: CanvasRenderingContext2D, x: number, y: number, radius: number, options?: {
        fill?: string;
        stroke?: string;
        lineWidth?: number;
    }): void;
    /**
     * 绘制矩形
     */
    static drawRect(ctx: CanvasRenderingContext2D, x: number, y: number, width: number, height: number, options?: {
        fill?: string;
        stroke?: string;
        lineWidth?: number;
        centered?: boolean;
    }): void;
    /**
     * 绘制线条
     */
    static drawLine(ctx: CanvasRenderingContext2D, x1: number, y1: number, x2: number, y2: number, options?: {
        color?: string;
        lineWidth?: number;
        dash?: number[];
    }): void;
    /**
     * 绘制文本
     */
    static drawText(ctx: CanvasRenderingContext2D, text: string, x: number, y: number, options?: {
        font?: string;
        color?: string;
        align?: CanvasTextAlign;
        baseline?: CanvasTextBaseline;
        stroke?: string;
        strokeWidth?: number;
    }): void;
}
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